Type-writing machine.



No. 668,731. Patented Feb. 26, |90|. J. FELBEL.

TYPE WRITING MACHINE.

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N0. 668,73I. Patented Feb. 26, l90l.

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UNITED STATES PATENT Grinch.

JACOB FELBEL, OF NEW YORK, N. Y.

TYPE-WRITING MACHINE.

' SPECIFICATION forming part of Letters Patent No. 638,731, dated February 26, 1901.

Original application filed June 19, 1900, serial No. 20,797. Divided and this application filed September 11, 1900. Serial No.

29,656. (No model.)

To all whom it may concern.-

Be it known that I, J AOOB FELBEL, a citizen of the United States, and a resident of theborough of Manhattan, city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This application relates to the carriagefeeding mechanism of type-writing machines, and is a division of my application filed J une 19, 1900, Serial No. 20,797.

The object of the present invention is to improve the connections between the universal bar and the carriage-escapement dogs, so as to render the touch of the finger-keys more agreeable and elastic and the operation of the escapement mechanism more prompt.

The invention consists in certain features of construction and combinations of devices, all as will be more fully hereinafter described, and particularly set forth in the concluding claims.

In the accompanying drawings, Figure 1 is a longitudinal central vertical section of a front-strike type-writing machine, showing my present improvements. Fig. 2 is a similar view, some of the parts being omitted, however, and showing the type-key depressed and the parts connected thereto in working position. Fig. 3 is an enlarged detail view showing the relation of the dog-rocker arm to its operating-link. Fig. 4is a perspective view of the dog-rocker arm and operatinglink.

In the several views similar parts are designated by similar numerals of reference.

The frame of the machine comprises a rectangular open base 1, corner-posts 2 rising therefrom, and a top plate 3, supported upon the posts. Horizontal key-levers 4 are pivoted at their rear ends to a transverse rod 5. The upward or return movements of said 1evers are limited by a pad 6, arranged over their forward or key ends and secured upon the under side of a horizontal transverse bar 6 A transverse universal bar or roller 19 is arranged beneath the key-levers and journaled at its ends at 20 upon arms 21, the latter being pivoted at their forward ends upon a transverse horizontal bar 22, mounted in the side walls of the base. Said arms 21 at their rear ends are rigidly united by a crossbar 23, the latter and the side arms taken to gether forming a bail.

At a point about midway of its length the bar 23 is formed with a lip or car 25, which extends rearwardly and is provided with a threaded hole with which engages a vertical screw 26, which may be firmly secured in any adjusted position by a nut 27. At its upper end the screw is reduced at 28 to form a neck,

which pivotally engages the horizontal member of a small angle-piece 29, said screw being formed with a head 30 to maintain the angle-piece in permanent engagement. To the vertical member of the angle-piece 29 is pivoted at 31 the lower end of a vertical link 32. The purpose of the screw 26 and the angle-piece swiveled thereto is to enable a vertical adjustment of the link 32. At its upper end the link is provided with a vertical slot 33, which plays upon a shouldered screw 34, the latter projecting laterally from an arm 35, which extends forwardly from a shaft 36, the latter being, as usual, pivoted at 37 to ears 38, extending rearwardly from a vertical plate or bracket 39, which is secured to the under side of the top plate. An arm 40 rises from the shaft 36 and carries at its upper end a stepping-dog 41 and a detent-dog 42, of which the former is normally in engagement with an escapement-wheel 43. A returning-spring 44 is coiled about the shaft 36. The escapement-wheel 43 is carried by the rear end of a shaft 45, which at its forward end is provided with a pinion 46, arranged in mesh with a rack 47, the latter being suitably connected to a paper-carriage 48, which may slide upon rails 49 and which carries a platen 50. A spring-drum 51 is connected by a strap 52 to the carriage, so as to propel the latter in letter-space direction.

In order to avoid the resistance offered by the dog-rocker (comprising arms and to being suddenly put in motion during the downstroke of the key-lever, I provide the link 32 with a forwardly-directed extension 53, Figs. 3 and 4, which is arranged over the forward portion of the arm 35 and in proximity thereto and is convexly curved upon its under or working face in such a manner that during the descent of the link 32 the extension 53 first contacts with the upper or working edge of the arm 35 at the forward extremity thereof, as illustrated at Fig. 3, and during further downward movement of the contacting parts the curved edge of the extension or rocker 53 rolls or creeps along the arm 35 until the rear extremity of the former is bearing upon the arm, Fig. 2, thus gradually decreasing the leverage of the universal bar upon the dog-rocker 35. The rolling motion is due to the different angular positions assumed by the arm 35 in its downward-swinging movement about the axis 37.

Inasmuch as the forward contact-point between the rocker and the arm is about twice as far from the axis 37 as the rearward contact-point it follows that the resistance offered by the dog-rocker is reduced about onehalf at the beginning of the stroke thereof, thus eifeetually easing the key action, so that during the ordinary operation of the keys the resistance caused by picking up the dogrocker is not perceived by the operator. It will be understood that this resistance is occasioned largely by the returning-spring 44 and partly by the friction between the dogs and the teeth of the escapement-wheel 43. It also follows from the described construction that the leverage of the spring 44 is greatest at the beginning of the return stroke, thus materially aiding in starting back both the dog-rocker frame and the universal bar and key-lever, as well as the connected type-bar. It will further be seen that by means of this construction it is possible without undue opposition to the completion of the key movement to pick up the feeding mechanism at a late point in the stroke of the key, and hence to relinquish said mechanism at an early point in the return stroke of the key, so that it may be at once operated by the succeeding key.-

The curved rocker 53 is preferably not formed integrally with the link 32, but is rather secured by screws 55 to an overhanging arm 54, formed upon the upper end of said link and extending forward horizontally. Owing to this construction the link 32 may lie against the arm 35, while the curved rocker 53 overhangs said arm. The object of the screw-and-slot connection of the link to the arm 35 is to guide the upper end of the link both before and during the rocking engagement just referred to. The key-lever is preferably partly depressed before the dog-rocker is picked up or set in motion.

The return movement of the dog-rocker is limited by contact of the arm 35 with the under side of the bracket 39 or by an intermediate screw, as usual. Until the dog-rocker is arrested the spring 44 operates to lift the universal-bar frame, and the motion of the latter is thereafter continued by a light spring 56, one end of which is secured at 57 and 58 to the arm 35 and the other end of which bears up against the under side of the head of one sion.

is caused to normally bear up against the under side of the key-levers. It will be seen that by reason of the em ploymentof the spring 56 a yielding connection is effected between the universal-bar frame and the dog-rocker frame.

Pivoted at 59 to each key-lever at a point between the ends thereof and just forwardly of the universal bar is a bell-crank lever comprising an arm 60 extending downwardly and forwardlyand an arm 61 extending upwardly. The lower end of the arm 60 is forked at 62 to embrace the fulcrum-rod 22. The upper end of each bell-crank is connected by a horizontal link 64 to a type bar 65, the link extending over the hub of the type-bar and the pivotal point of connection to the type-bar being indicated at 66. The type-bars-are pivoted concentrically at their rear ends upon a curved rod-75, which is secured in the bottom of a curved slot cut in a segment 76.

slots 77, one for each type-bar. The forward ends of the type-bars lie upon a rest 92, having a pad93 and supported upon the forward ends of horizontal rods 95, which at their rear endsare rigidly attached to the segment 76.

In operation when a key-lever 4 is depressed the universal bar 19 and its supporting-frame are forced downwardly about the axis 22, pulling down link 32 and extension 53- thereon. The forward point of the latter first contacts with the arm 35, as at Fig. 3, and during the continuance of the downward movement the lower edge of the extension 53 rolls or creeps along the upper edge of the arm 35 as thelatter swings about the pivot 37, until at the completion of the key-stroke the rear end of the extension 53 is in contact with the arm 35, as at Fig. 2, at which time the purchase or leverage of the finger-key and universal bar upon the dog-rocker is the least. During the movement of the arm or lever 35 the upright arm 40 of the dog-rocker swings forwardly to disengage the dog 41 from and engage the detent 42 with the escapementwheel 43, the dog 41 then stepping forward to a position opposite the next notch in the wheel,

in the usual way. By the said downward.

movement of the key-lever the upper end of the bell-crank 61, pivoted thereon, is caused to swing rearwardly, and through the link 64 swings the type-bar up to make the impres- Upon the relief of the finger-key from pressure the several parts return to normal return movement of the parts andthereafter gradually diminishes as the extension 53 creeps-or rolls along the upper edge of the The upper side of the latter comes arm 35. to rest against the under side of the bracket 39, and thereupon the spring 56 operates to complete the return of the link 32 and universal-bar frame to normal position. At the of the screws 55, so that the universal bar 19 1 rearward movement of the upright arm 40 of The latter is also provided with a series of radial the dog-rocker the detent 42 releases the escapement-wheel 43, thereby permitting the latter to advance one step, or until it is arrested by the feeding-dog 41, in a well-known manner. The movement of the escapementwheel is effected by the carriage-rack 47, pinion 46, and shaft 45, the movement of the carriage being caused by the spring-drum 51, through the strap 52, as usual.

In practice I provide each type-bar and keylever with a separate returning-spring.

What I claim as new and desire to secure by Letters Patent, is-

1. In a type-writing machine, the combination with a platen,letter-feeding devices therefor, a series of'type-keys, and a universal bar, of a pivoted armconnected to operate said feeding devices, and a link'suitably connected at one end to the universal'bar and at the other end havinga creeping engagement with said arm, whereby the leverage of said universal bar upon said arm'is gradually changed during the movement of the link, and arm.

2. In a type-writing machine, the combination with a carriage, feeding devices therefor, a series of type-keys, and a universal bar, of a pivoted arm connected to the feeding devices, and a link connected at one end to the universal bar and at the other end having a rocker extending along said pivoted arm and adapted to creep along said arm during the combined movement of the link and the arm, whereby the leverage of the universal bar upon the feedingdevices is gradually changed.

3. In a type-writing machine, the combination with a carriage,escapement devices therefor, a series of type-keys, and a universal bar, of connections from said universal bar to said eseapement devices, the latter including two creeping members for gradually decreasing the leverage of the universal bar upon said escapement devices,.said creeping members being normally out of contact with each other, so that said escapement devices remain motionless during the initial portion of the type-key stroke.

4. In a type-writing machine, the combination with a carriage,escapement devices therefor, a series. of type-keys, and a universalbar frame, of a link connected at its lower end to the universal-bar frame, means for guiding the upper end of the link, a laterallyextending rocker arranged upon said link, and a pivoted arm extending in proximity to I said rocker and constructed to be engaged thereby and to operate said escapement devices.

5. In a type-writing machine, the combination of a power-driven carriage, escapement devices therefor, including a vibrating frame having an upright dog-carrying arm and a horizontal operating-arm, a series of typekeys, a universal -bar frame, a link pivoted at its lower end to said universal-bar frame and slotted atits upper end to engage a lateral projection provided upon the said horizontal operating-arm, and a horizontally-extending rocker secured upon said link and arranged in proximity to said horizontal operating-arm, the construction and arrangement being such that at the operation of said link, the rocker engages the arm at a point remote from the pivot of the latter, and creeps along said arm toward said pivot.

6. In a type-writing machine, the combination of a power-drivencarriage, escapement devices therefor, including a vibrating frame having thereon an upright dog-carrying arm and a horizontal operating-arm, a series of type-keys, a universal-bar frame, a link pivoted at its lower end to said universal-bar frame and slotted at its upper end to engage a lateral projection provided upon said horizontal operating-arm, a horizontally-extending rocker secured upon said link and arranged in proximity to said horiz'ontal operating arm, the construction and arrangement being such that at the operation of said link, the rocker engages the arm at a point remote from the pivot of the latter and creeps along said arm toward said pivot, a returning-spring and a stop for said vibratory dogframe, and a spring connected to said dogframe and constructed to complete the return movement of the universal-bar frame to normal position.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 10th day of Septemher, A. D. 1900.

J AOOB FELBEL.

Witnesses:

E. M. WELLS, K. V. DONOVAN. 

